<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="{{ url_for('static',filename='test.css') }}">
</head>
<body>
{# 基础模板 #}
{% block header %}
    <div>this is header </div>
{% endblock %}


{% block content %}
    <div>this is content </div>
{% endblock %}


{% block footer %}
    <div>this is footer </div>
{% endblock %}


</body>
</html>